Category: algorithms

Teaching Kids Programming: Videos on Data Structures and Algorithms Given a binary search tree (BST), find the lowest common ancestor (LCA) node of two given nodes in the BST. …

Given a list of integers nums and an integer k, determine if there are three distinct elements in the list that add up to k. Constraints n ≤ 1,000 …

Teaching Kids Programming: Videos on Data Structures and Algorithms Given a non-negative integer n, count all numbers with unique digits, x, where 0 ≤ x < 10^n. Example: Input: …

Given a singly linked list node, reorder it such that we take: the last node, and then the first node, and then the second last node, and then the …

Teaching Kids Programming: Videos on Data Structures and Algorithms Trie (we pronounce “try”) or prefix tree is a tree data structure used to retrieve a key in a strings …